package lab2.text36;

/**
 * Created by Administrator on 2017/11/21.
 */
public class Undergraduate extends Student{


    @Override
    String calGrade() {
        double avg=calAverage();
        if(avg>=80&&avg<=100)
            grade="优秀";
        else if(avg>=70&&avg<=80)
            grade="良好";
        else if(avg>=60&&avg<=70)
            grade="一般";
        else if(avg>=59&&avg<=60)
            grade="及格";
        else
            grade="不及格";
        return null;
    }
}
